#ifndef SYNCHRONIZATION_H_INCLUDED
#define SYNCHRONIZATION_H_INCLUDED

#include "fileHierarchy.h"
#include "library/processXml.h"
#include <memory>

#ifdef FFS_WIN
#include "shared/shadow.h"
#endif

class StatusHandler;


namespace FreeFileSync
{
class SyncStatistics
{
public:
    SyncStatistics(const HierarchyObject&  hierObj);
    SyncStatistics(const FolderComparison& folderCmp);

    int         getCreate(   bool inclLeft = true, bool inclRight = true) const;
    int         getOverwrite(bool inclLeft = true, bool inclRight = true) const;
    int         getDelete(   bool inclLeft = true, bool inclRight = true) const;
    int         getConflict() const;
    wxULongLong getDataToProcess() const;
    int getRowCount() const;

private:
    void init();

    void getNumbersRecursively(const HierarchyObject& hierObj);

    void getFileNumbers(const FileMapping& fileObj);
    void getDirNumbers(const DirMapping& dirObj);

    int createLeft,    createRight;
    int overwriteLeft, overwriteRight;
    int deleteLeft,    deleteRight;
    int conflict;
    wxULongLong dataToProcess;
    int rowsTotal;
};

bool synchronizationNeeded(const FolderComparison& folderCmp);


struct FolderPairSyncCfg
{
    FolderPairSyncCfg(bool inAutomaticMode,
                      const DeletionPolicy handleDel,
                      const Zstring& custDelDir) :
        updateSyncDB(inAutomaticMode),
        handleDeletion(handleDel),
        custDelFolder(custDelDir) {}

    bool updateSyncDB; //update database if in automatic mode
    DeletionPolicy handleDeletion;
    Zstring custDelFolder;
};
std::vector<FolderPairSyncCfg> extractSyncCfg(const MainConfiguration& mainCfg);


//class handling synchronization process
class SyncProcess
{
public:
    SyncProcess(const bool copyFileSymLinks,
                const bool traverseDirSymLinks,
                xmlAccess::OptionalDialogs& warnings,
                const bool verifyCopiedFiles,
                StatusHandler* handler);

    //CONTRACT: syncConfig must have SAME SIZE folderCmp and correspond per row!
    void startSynchronizationProcess(const std::vector<FolderPairSyncCfg>& syncConfig, FolderComparison& folderCmp);

private:
    template <bool deleteOnly>
    class SyncRecursively;

    struct DeletionHandling
    {
        DeletionHandling(const DeletionPolicy handleDel,
                         const Zstring& custDelFolder);

        DeletionPolicy handleDeletion;
        Zstring currentDelFolder; //alternate deletion folder for current folder pair (with timestamp, ends with path separator)
        //preloaded status texts:
        const Zstring txtMoveFileUserDefined;
        const Zstring txtMoveFolderUserDefined;
    };

    void syncRecursively(HierarchyObject& hierObj);
    void synchronizeFile(FileMapping& fileObj, const DeletionHandling& delHandling) const;
    void synchronizeFolder(DirMapping& dirObj, const DeletionHandling& delHandling) const;

    template <FreeFileSync::SelectedSide side>
    void removeFile(const FileMapping& fileObj, const DeletionHandling& delHandling, bool showStatusUpdate) const;

    template <FreeFileSync::SelectedSide side>
    void removeFolder(const DirMapping& dirObj, const DeletionHandling& delHandling) const;

    void copyFileUpdating(const Zstring& source, const Zstring& target, const wxULongLong& sourceFileSize) const;
    void verifyFileCopy(const Zstring& source, const Zstring& target) const;

    const bool m_copyFileSymLinks;
    const bool m_traverseDirSymLinks;
    const bool m_verifyCopiedFiles;

    //warnings
    xmlAccess::OptionalDialogs& m_warnings;

#ifdef FFS_WIN
    //shadow copy buffer
    std::auto_ptr<ShadowCopy> shadowCopyHandler;
#endif

    StatusHandler* const statusUpdater;

    //preload status texts
    const Zstring txtCopyingFile;
    const Zstring txtOverwritingFile;
    const Zstring txtCreatingFolder;
    const Zstring txtDeletingFile;
    const Zstring txtDeletingFolder;
    const Zstring txtMoveToRecycler;
    const Zstring txtVerifying;
};
}

#endif // SYNCHRONIZATION_H_INCLUDED